{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:O4TV454X7DPEEOMJZBWW3BQ2DY","short_pith_number":"pith:O4TV454X","canonical_record":{"source":{"id":"1504.04375","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-16T20:00:41Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f21dc27fd5b238241c0d59787955e896c30a6ed07bbb22d94c817d47dab685dc","abstract_canon_sha256":"de201682e78df36a4f8f9b9c351236694a13caf3359d8652d47b9ddc1b8156cd"},"schema_version":"1.0"},"canonical_sha256":"77275e7797f8de423989c86d6d861a1e135de115cc1577df785a93da439c673d","source":{"kind":"arxiv","id":"1504.04375","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.04375","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"arxiv_version","alias_value":"1504.04375v2","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.04375","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"pith_short_12","alias_value":"O4TV454X7DPE","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"O4TV454X7DPEEOMJ","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"O4TV454X","created_at":"2026-05-18T12:29:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:O4TV454X7DPEEOMJZBWW3BQ2DY","target":"record","payload":{"canonical_record":{"source":{"id":"1504.04375","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-16T20:00:41Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f21dc27fd5b238241c0d59787955e896c30a6ed07bbb22d94c817d47dab685dc","abstract_canon_sha256":"de201682e78df36a4f8f9b9c351236694a13caf3359d8652d47b9ddc1b8156cd"},"schema_version":"1.0"},"canonical_sha256":"77275e7797f8de423989c86d6d861a1e135de115cc1577df785a93da439c673d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:30.989155Z","signature_b64":"iSY+58z1mw8+0zyNvag1mw3o0zMqGO4/l1Qg9sCNFzJohd4MV5/zPcazLcvn15gGC/uUQDfCxMyKqN0DwRyqCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"77275e7797f8de423989c86d6d861a1e135de115cc1577df785a93da439c673d","last_reissued_at":"2026-05-18T01:37:30.988637Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:30.988637Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.04375","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:37:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qIipJdBNoI7OtGYwdjOyU13YqM9GbJjwlNx8SdU5DwClByPexSCfLkwZ7hjLb6nFzvbuYId1hTh5eGUyqaGSAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:45:49.267399Z"},"content_sha256":"633d5dcba060e4d56db035da64dcfb268fbe8963fce95321e49a1f1a39b0bc84","schema_version":"1.0","event_id":"sha256:633d5dcba060e4d56db035da64dcfb268fbe8963fce95321e49a1f1a39b0bc84"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:O4TV454X7DPEEOMJZBWW3BQ2DY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rotating Stellar Models Can Account for the Extended Main Sequence Turnoffs in Intermediate Age Clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Chelsea X. Huang, Timothy D. Brandt","submitted_at":"2015-04-16T20:00:41Z","abstract_excerpt":"We show that the extended main sequence turnoffs seen in intermediate age Large Magellanic Cloud (LMC) clusters, often attributed to age spreads of several hundred Myr, may be easily accounted for by variable stellar rotation in a coeval population. We compute synthetic photometry for grids of rotating stellar evolution models and interpolate them to produce isochrones at a variety of rotation rates and orientations. An extended main sequence turnoff naturally appears in color-magnitude diagrams at ages just under 1 Gyr, peaks in extent between ~1 and 1.5 Gyr, and gradually disappears by aroun"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.04375","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:37:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mvjKUvd20Ur8Q4K5IeLnw/c2xyxk8HfBPk/ZFs5DCB1w7v368uqLgD+b4QPK0x8N728lugz0iYRBJtHhGovQBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:45:49.267750Z"},"content_sha256":"1f0f8d696f99be0448636b318cbbc47c6e10c67220edf7681896cdf9955c6714","schema_version":"1.0","event_id":"sha256:1f0f8d696f99be0448636b318cbbc47c6e10c67220edf7681896cdf9955c6714"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O4TV454X7DPEEOMJZBWW3BQ2DY/bundle.json","state_url":"https://pith.science/pith/O4TV454X7DPEEOMJZBWW3BQ2DY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O4TV454X7DPEEOMJZBWW3BQ2DY/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T10:45:49Z","links":{"resolver":"https://pith.science/pith/O4TV454X7DPEEOMJZBWW3BQ2DY","bundle":"https://pith.science/pith/O4TV454X7DPEEOMJZBWW3BQ2DY/bundle.json","state":"https://pith.science/pith/O4TV454X7DPEEOMJZBWW3BQ2DY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O4TV454X7DPEEOMJZBWW3BQ2DY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:O4TV454X7DPEEOMJZBWW3BQ2DY","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"de201682e78df36a4f8f9b9c351236694a13caf3359d8652d47b9ddc1b8156cd","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-16T20:00:41Z","title_canon_sha256":"f21dc27fd5b238241c0d59787955e896c30a6ed07bbb22d94c817d47dab685dc"},"schema_version":"1.0","source":{"id":"1504.04375","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.04375","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"arxiv_version","alias_value":"1504.04375v2","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.04375","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"pith_short_12","alias_value":"O4TV454X7DPE","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"O4TV454X7DPEEOMJ","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"O4TV454X","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:1f0f8d696f99be0448636b318cbbc47c6e10c67220edf7681896cdf9955c6714","target":"graph","created_at":"2026-05-18T01:37:30Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We show that the extended main sequence turnoffs seen in intermediate age Large Magellanic Cloud (LMC) clusters, often attributed to age spreads of several hundred Myr, may be easily accounted for by variable stellar rotation in a coeval population. We compute synthetic photometry for grids of rotating stellar evolution models and interpolate them to produce isochrones at a variety of rotation rates and orientations. An extended main sequence turnoff naturally appears in color-magnitude diagrams at ages just under 1 Gyr, peaks in extent between ~1 and 1.5 Gyr, and gradually disappears by aroun","authors_text":"Chelsea X. Huang, Timothy D. Brandt","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-16T20:00:41Z","title":"Rotating Stellar Models Can Account for the Extended Main Sequence Turnoffs in Intermediate Age Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.04375","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:633d5dcba060e4d56db035da64dcfb268fbe8963fce95321e49a1f1a39b0bc84","target":"record","created_at":"2026-05-18T01:37:30Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"de201682e78df36a4f8f9b9c351236694a13caf3359d8652d47b9ddc1b8156cd","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-16T20:00:41Z","title_canon_sha256":"f21dc27fd5b238241c0d59787955e896c30a6ed07bbb22d94c817d47dab685dc"},"schema_version":"1.0","source":{"id":"1504.04375","kind":"arxiv","version":2}},"canonical_sha256":"77275e7797f8de423989c86d6d861a1e135de115cc1577df785a93da439c673d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"77275e7797f8de423989c86d6d861a1e135de115cc1577df785a93da439c673d","first_computed_at":"2026-05-18T01:37:30.988637Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:30.988637Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iSY+58z1mw8+0zyNvag1mw3o0zMqGO4/l1Qg9sCNFzJohd4MV5/zPcazLcvn15gGC/uUQDfCxMyKqN0DwRyqCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:30.989155Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.04375","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:633d5dcba060e4d56db035da64dcfb268fbe8963fce95321e49a1f1a39b0bc84","sha256:1f0f8d696f99be0448636b318cbbc47c6e10c67220edf7681896cdf9955c6714"],"state_sha256":"28742529c48c5f8e8787ad4d56705d4705c420dda1bf8f8cc4c010de817d0b4d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EzXPGfeegyAB9qSdwV6YPRuD0eWs/ge8N5oxa51uLtq4YWfmsngGkx95I0uiNasGP+9ZfknhcTx7Z8uf6/IgAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T10:45:49.269941Z","bundle_sha256":"0380b9e58d9275e49a9d3459218b730734aa456eada2d3644c2cfb199be1b1bc"}}